/**
 *    Copyright ${license.git.copyrightYears} the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.mybatis.generator.codegen.mybatis3.model;

import static org.mybatis.generator.internal.util.JavaBeansUtil.getJavaBeansField;
import static org.mybatis.generator.internal.util.JavaBeansUtil.getJavaBeansGetter;
import static org.mybatis.generator.internal.util.JavaBeansUtil.getJavaBeansSetter;
import static org.mybatis.generator.internal.util.messages.Messages.getString;

import java.util.ArrayList;
import java.util.List;

import org.mybatis.generator.api.CommentGenerator;
import org.mybatis.generator.api.FullyQualifiedTable;
import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.Plugin;
import org.mybatis.generator.api.dom.java.CompilationUnit;
import org.mybatis.generator.api.dom.java.Field;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
import org.mybatis.generator.api.dom.java.JavaVisibility;
import org.mybatis.generator.api.dom.java.Method;
import org.mybatis.generator.api.dom.java.Parameter;
import org.mybatis.generator.api.dom.java.TopLevelClass;
import org.mybatis.generator.codegen.AbstractJavaGenerator;
import org.mybatis.generator.codegen.RootClassInfo;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class PrimaryKeyGenerator extends AbstractJavaGenerator {

  public PrimaryKeyGenerator() {
    super();
  }

  @Override
  public List<CompilationUnit> getCompilationUnits() {
    FullyQualifiedTable table = introspectedTable.getFullyQualifiedTable();
    progressCallback.startTask(getString("Progress.7", table.toString())); //$NON-NLS-1$
    Plugin plugins = context.getPlugins();
    CommentGenerator commentGenerator = context.getCommentGenerator();

    TopLevelClass topLevelClass = new TopLevelClass(introspectedTable.getPrimaryKeyType());
    topLevelClass.setVisibility(JavaVisibility.PUBLIC);
    commentGenerator.addJavaFileComment(topLevelClass);

    String rootClass = getRootClass();
    if (rootClass != null) {
      topLevelClass.setSuperClass(new FullyQualifiedJavaType(rootClass));
      topLevelClass.addImportedType(topLevelClass.getSuperClass());
    }

    if (introspectedTable.isConstructorBased()) {
      addParameterizedConstructor(topLevelClass);

      if (!introspectedTable.isImmutable()) {
        addDefaultConstructor(topLevelClass);
      }
    }

    commentGenerator.addModelClassComment(topLevelClass, introspectedTable);

    for (IntrospectedColumn introspectedColumn : introspectedTable.getPrimaryKeyColumns()) {
      if (RootClassInfo.getInstance(rootClass, warnings).containsProperty(introspectedColumn)) {
        continue;
      }

      Field field = getJavaBeansField(introspectedColumn, context, introspectedTable);
      if (plugins.modelFieldGenerated(field, topLevelClass, introspectedColumn, introspectedTable,
          Plugin.ModelClassType.PRIMARY_KEY)) {
        topLevelClass.addField(field);
        topLevelClass.addImportedType(field.getType());
      }

      Method method = getJavaBeansGetter(introspectedColumn, context, introspectedTable);
      if (plugins.modelGetterMethodGenerated(method, topLevelClass, introspectedColumn, introspectedTable,
          Plugin.ModelClassType.PRIMARY_KEY)) {
        topLevelClass.addMethod(method);
      }

      if (!introspectedTable.isImmutable()) {
        method = getJavaBeansSetter(introspectedColumn, context, introspectedTable);
        if (plugins.modelSetterMethodGenerated(method, topLevelClass, introspectedColumn, introspectedTable,
            Plugin.ModelClassType.PRIMARY_KEY)) {
          topLevelClass.addMethod(method);
        }
      }
    }

    List<CompilationUnit> answer = new ArrayList<CompilationUnit>();
    if (context.getPlugins().modelPrimaryKeyClassGenerated(topLevelClass, introspectedTable)) {
      answer.add(topLevelClass);
    }
    return answer;
  }

  private void addParameterizedConstructor(TopLevelClass topLevelClass) {
    Method method = new Method();
    method.setVisibility(JavaVisibility.PUBLIC);
    method.setConstructor(true);
    method.setName(topLevelClass.getType().getShortName());
    context.getCommentGenerator().addGeneralMethodComment(method, introspectedTable);

    StringBuilder sb = new StringBuilder();
    for (IntrospectedColumn introspectedColumn : introspectedTable.getPrimaryKeyColumns()) {
      method.addParameter(new Parameter(introspectedColumn.getFullyQualifiedJavaType(), introspectedColumn
          .getJavaProperty()));
      sb.setLength(0);
      sb.append("this."); //$NON-NLS-1$
      sb.append(introspectedColumn.getJavaProperty());
      sb.append(" = "); //$NON-NLS-1$
      sb.append(introspectedColumn.getJavaProperty());
      sb.append(';');
      method.addBodyLine(sb.toString());
    }

    topLevelClass.addMethod(method);
  }
}
